Malicious PDF — malware analysis report

Static analysis result for SHA-256 21600e6ee106a96e…

MALICIOUS

PDF

74.2 KB Created: 2021-03-16 17:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 58cfa98b83073998cf37b82eef6f44c4 SHA-1: b7b1766136f1a09d8e4ce6bfd1fc5974e953e157 SHA-256: 21600e6ee106a96ed4742c8f1f04e7f23b038454d5babfda0fc4a7dbd6abaa96
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/123?utm_term=diet+and+exercise+planner+template PDF link annotation
    • http://muzoc.xyz/perogebezogofimebhnho.pdfIn PDF document text
    • http://eurostore.info/what_is_the_average_salary_for_an_it_project_managertbagb.pdfIn PDF document text
    • http://wssummer.space/9674455582523eif.pdfIn PDF document text
    • http://kudezixajuxuni.66ghz.com/89344301610.pdfIn PDF document text
    • http://lebepufu.mypressonline.com/91114577776.pdfIn PDF document text
    • http://thelait.pro/line_6_pod_hd500_bass_patchesf6cge.pdfIn PDF document text
    • http://lnstagramcentre.net/water_ridge_pull_out_kitchen_faucet_manualj4nz9.pdfIn PDF document text
    • http://inscarusa.info/math_magic_tricks_with_answers_in_hindiqfwju.pdfIn PDF document text
    • http://todayshop.website/ladenusaniyrc37.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/2844272371d2h06.pdfIn PDF document text
    • http://soxisit.22web.org/7672866210.pdfIn PDF document text
    • http://takipleskazan.org/kenmore_washer_drain_pump_removal11lvx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuxoxokazutuv.myartsonline.com/87459351105.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/mcdonalds_marketing_mix_physical_evidence.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/gedewumuxajomogulesikexok.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/xagaj.pdfIn PDF document text
    • http://lujarozukivexoz.epizy.com/apache_tomcat_7._0._59_error_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/vamanulo.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/1058491553.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE640 5284 bytes
SHA-256: 5522e6461322aee3862b5e913c044fa65600814fed5fa46a8165064f3a255ce3
font_01_sfnt_off0000f830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF830 10480 bytes
SHA-256: c233d9c8320a58e0db5ba3e53db34ae74eda43786c70849189654264bf2f6ed8